Synthesis and Structural Characterisation of an N-Phosphanyl Ferrocene Carboxamide and its Ruthenium, Rhodium and Palladium Complexes.

[((Diphenylphosphanyl)amino)carbonyl]ferrocene (1) has been synthesized and coordinated to light platinum metals, ruthenium, rhodium and palladium, in diverse coordination modes. Specifically, compound 1 was used to prepare the following phosphane complexes, [(η6 -mes)RuCl2 (1-κP)], [(η5 -C5 Me5 )RhCl2 (1-κP)], trans-[PdCl2 (1-κP)2 ], and [(LNC )PdCl(1-κP)] (mes=mesitylene, LNC =[2-(dimethylamino-κN)methyl]phenyl-κC1 ). They were subsequently converted into cationic O,P-chelate complexes by halide abstraction with AgClO4 and into neutral O,P-chelate complexes by deprotonation with potassium tert-butoxide. All coordination compounds and phosphane chalcogenides 1E (P-bound chalcogen atom E=O, S and Se), which were also synthesised, were structurally characterised using spectroscopic methods (IR, multinuclear NMR and ESI MS) and single-crystal X-ray diffraction analysis. The electrochemical behaviour of the prepared compounds was studied by cyclic voltammetry, and the (LNC )Pd-1 complexes were further studied by Mössbauer spectroscopy.